There are many visual chemicals for troubleshooting JVM problems, such as JDK jConsole, JvSualVM, etc., third-party MAT, GChisto, GCView, etc.
Jconsole checks the memory reclamation
The jConsole tool is in the bin directory of the JDK.
Select your own process, enter, will prompt unsafe links, continue to click in
You’ll see an overview of the entire JVM
You can view threads and memory usage
You can also select a section of JVM memory, such as the Eden region of the new generation, Survivor region, old generation, and so on.
You can also look at the VM profile, as shown in the figure
For remote connection please refer to:
Blog.csdn.net/u012758088/…
Jvisualvm looks at memory reclamation
Jvisualvm tools are in the bin directory of the JDK. , similar to jConsole;
Double click on the
Choose our process
This is a relatively small overview
Monitor the overall situation, CPU, heap, classes, threads
View thread-related data
Go to the Profiler, click on memory, and then enter the analysis phase, where the data for the objects in memory is shown below
You can view objects in memory at work.
Please refer to:
My.oschina.net/u/2300159/b…
Third-party tools
MAT
Java heap memory analysis tool.
GChisto
GC log analysis tool.
GCViewer
GC log analysis tool.
JProfiler
Commercial performance analysis tools.
arthas
Ali open source diagnostic tool.
- Github.com/alibaba/art…
async-profiler
Java application performance analysis tool, open source, flame map, cross-platform.
- Github.com/jvm-profili…
For the use of third-party tools, the following articles will demonstrate and explain each tool in detail. It would be a lot of space to describe all the detailed steps and precautions for using all the tools.
Continue to update, stay tuned ~